Songs from Joseph and the Amazing Technicolor Dreamcoat - 1974 Original Dublin Cast

Hi All, I'm a noob here but am trying to get my hands on a copy of this recording. To cut a long story short it means a such huge amount to my ageing Parents and brother:- he can sing it start to finish acapella after 30 years (!) and it would mean so much to have a copy of the one we know sung by the inimitable Tony. I tried contacting him by Facebook but got no reply. Can anyone help PLEASE!? I'm more than happy to pay for your trouble in accordance with copyright etc etc etc Faithfully yours, Rob.